package ink.feny;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;
import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;

/**
 * 
 * 为路线提供Hystrix回退
 * 
 * @author Feny
 * @date 2020年3月1日
 *
 */
@Component
public class ZuulFallbackProvider implements FallbackProvider {

	@Override
	public String getRoute() {
		return "*";
	}

	@Override
	public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
		return new ClientHttpResponse() {
			@Override
			public HttpStatus getStatusCode() throws IOException {
				return HttpStatus.OK;
			}

			@Override
			public int getRawStatusCode() throws IOException {
				return HttpStatus.OK.value();
			}

			@Override
			public String getStatusText() throws IOException {
				return HttpStatus.OK.name();
			}

			@Override
			public void close() {

			}

			@Override
			public InputStream getBody() throws IOException {
				JSONObject jsonObject = new JSONObject();
				try {
					jsonObject.put("code", 400);
					jsonObject.put("msg", "请求失败，请重试或联系客服。");
				} catch (JSONException e) {
				}
				return new ByteArrayInputStream(jsonObject.toString().getBytes());
			}

			@Override
			public HttpHeaders getHeaders() {
				HttpHeaders headers = new HttpHeaders();
				headers.setContentType(MediaType.APPLICATION_JSON);
				return headers;
			}
		};
	}

}
